Carbureter.



H. L. RAKESTRAW Y CARBURETER. APPLlcATloN f|LED'rE.,7.1914.

Patented My 18, 1915.

' Wl TNE SSE S HARRISON L. RAKESTRAW, or TOLEDO, omo.V

GARBURETEB.

To all/whom it may concern.'

Be it known that I, HARRISON L. RAKE- STRAW, a citizen of the UnitedStates of Y America, residing at Toledo, Lucas county,

Ohio, have invented a new and useful Carbureter, of which the followingis a specification.

This invention relates to vaporizing a liquid. 4

This invention has utility when adapted to forming fuel gas by thecommingling of a liquid and air, and as disclosed herein may be readilyused for carbureting gasoleneor kerosene, or different hydrocarbons ofWidely diderent properties.

Referring to the drawings, Figure 1 is a medial vertical section througha carbureter embodying features of the invention; Fig. 2 is a section onthe line II-II, Fig. 1, looking 'in the direction of the arrow; Fig. 3is la fragmentary view, on an enlarged scale of the cam controlling theby-pass duct; and

Fig. 4 is a section on the line IV-IV, Fig. 1, looking in the directionof the arrow.

`The duct 1, for fuel supply, say gasolene, is in communication throughthe passage 2 (Figs. 1, 4) inthe valve 3 with the upwardly extendingpassage 4 in the valve 3. The valve 3 may be shifted by the arm 5 fromthe supply passage 1 to cut off said passage 1 and be in communicationwith the passage 6, say supplying kerosene, or a less easily carburetedhydrocarbon than is sup` plied by the passage 1. The handle 5 permits ofready control of the three-way valve 3.

The valve passage 4 has its communication with the fuel supply passage 7controlled by the needle valve 8 mounted on the lever 9 carrying thefloat 10 in the reservoir 11 in communication by the passage 12 with thepassage 7. The float 10, through-the valve 8 maintains a constant levelof fuel in the reservoir 11 and passage 7.

The'fuel is removed by injector action for the carbureting through theduct 13, which has the needle valve 14, which may have its degree ofopening accurately controlled by the cam eled in the shoe or adjustablecam face 17.

By shifting the arm 18 through the link 19,

Specification of Letters Patent.

positions of the cam.

15 provided with the bolts 16 swiv- Patented May 18, 1915.

Application filed February 7, 1914. Serial No. 817,138.

theposition of the cam 15 may be such as to Y allow the spring 2O tohold the valve needle 14 inthe proper clearance as to the passage 13for-allowing the desired liquid fuel supply to pass as determined forthe various vThe passage 13 ley-passes and is in direct communicationwith the entrance to the passage 7, -permitting this passage 13 at onceto receive the character of fuel with lwhich the arm 5 has placed thevalve 3 in communication, and conduct such liquid fuel to be sprayedimmediately by the spreading tubular jets 21 in the upward flow of .theprimary air supply from the'v duct 22 1n the upwardly extending passage23 passingcentrally through the reservoir 11 to the fuel or mixingchamber. The fuel dispersing jets 21 tend to subdivide ther liquid tosuch an extent'throughout the inrushing air that complete atomization isapproached.

A supply fora heating mediumis conveniently available in the form ofinternal combustion engineexhaust having the passage 25 provided withthe enlargementv 26 therein jacketing the chamber 24 in its vtravel toits outlet section 27 The chamber 24`has the inward and downwardlyextend.- ing heatl conducting and liquid draining baffles 28, which arealternately oppositely inclined. The warmed walls of the chamber 24 keepthese baiiles 28 heated, and any liquid particles adhering thereto arewarmed to approach vaporization temperature. Should Vaporization not bethus effected, the

the reservoir 11 accumulated liquid in running down the 'baiiiesapproaches the high velocity vapor stream and in fallingV into thevolume thereof has its vapori'zationV made certain. The Vundercutcontinuous edges 29 of the walls of the chamber 24 and passage 23, likethe baiiles. 28 conduct any condensation into the air or gas streamvolume to be re-vapOriZed. Between the reservoir-11 'and the chamber 24is the heat insulation -packing 30 reducing the tendency towardvaporization of the liquid fuel in the reservoir 1 1, thereby avoidingloss from this source aswell as fluctuation in the oat control due togravity change. The flow of the fuel from the mixing or fuel chamber 24may be controlled by the controllable valgye -or throttle 31 which maybe in communication witlr'the cylinders of readily carbureting supplymay be selected' -by the valve 3. That themixture may be rich,onlytheprimary air, supply 22 may bey internal combustion motors for thedrawing of the fuel supply therefor.

In startinga' motor, an easily combustible mixture may be desired,andthe more used. As. the motor gets under Way and iheated' up, the lessreadily vaporized fuel vmaybeusedi To decrease the richness of the f uelmixture, a secondary air supply may be admitted by so shifting the'lever32v as to allow the disk-33 to rise that the spring 34 may permit thevalve 35 to unseat at y the suction through the chamber 24:, and draw ina further air supply by way ofthe passage 36 in communication withtheplus rality of parallel tubes 37 jacketed' to be',

heated by the exhaust and then delivered to the chamber 24. By cuppingthe valve 35, it may unseat some distance before clearance f or anyappreciable air intake occurs, thereby avoiding chatter in operation.

The carbureter as herein disclosed, is. simple in its structure, capableof use with widely varying character 'offuel or fuels,.

for easy and economical operation.

In the operation of the throttle 3l, the fuel intake valve 14 may toadvantage be controlled'simultaneously by the shifting of the cam l5 tolet in more fuel as the throttle l uses more mixed charge from'thejcham- 'lfhel central rsleeve -38- of the valve disk:

35 guides the disk in lits reciprocations along the rod 39, rwhileadjusting the nut 40 may through the disk 33 fast on the stem 39 varythe seating force of the spring 34 as may be desired in normal runningin` dependently of thecut out of this air supply by the lever 32.

-`What is claimed and it isdesired to secure by Letters Patent is:

1. A; carbureter embodying a centrally disposed upwardly opening fuelsupply passage, an air supply passage there'about for initially bringingthe fuel into suspension,

a chamber to which said passages deliver,

said chamber provided with baffles inwardly and downwardly extending,the undersides of said baffles upwardly extending from central of thechamber, each lower baffle having its free edge overlapped by the dripedge of the next battle above, whereby any consage, control means forselecting theduct to supply the passage, al1 al1'S`l1pply passage, and avfuelley-pass .ductdirect from the valve to the air supply passage.

3. The combination in 'a-'carbureter of ai' float reservoir and a mixingchamber, of heating means for the chamber,and'a-v heat insulating4partition `between and reservoir,

In witness whereof I ailix m in the presence of two witnesses. y

l HARRISON L. RAKESTRAW. Witnesses: l

' GEO. E. KIRK,

GLADYS JAMESON.

A gnature

